Lathe.



G. D. FISCHER, JR. I

LATHE. APPLICATION FILED SEPT. 12, 1907.

Patented Nov. 30, 1909.

3 SHEETS-SHEET 1.

Wimesses O. D. FISCHER, JR.

LATHE.

' APPLICATION FILED SEPT. 12, 1907.

Patented Nov. 30, 1909 3 SHEETS-SHEET 2.

Witnesses Mm r afifir /P M G. D. FISCHER, JR.

LATHE.

APPLICATION FILED SEPT. 12, 1907.

Patented Nov. 30, 1909.

3 SHEETS-SHEET 3.

V :Wimesses CARL D. FISCHER, .13., or WArAKoNErA, 01-110.

LATHE.

Specification of Letters Patent.

Patented Nov. 30, 1909.

Application filed September 12, 1907. Serial No. 392,485.

To all whom it may concern:

Be it known that I, CARL D. FISCHER, J r., a citizen of the UnitedStates, residing at Wapakoneta, in the county of Auglaize and State ofOhio, have invented certain new and useful Improvements in Lathes, ofwhich the following is a description.

My invention relates to that class of device known as lathes andparticularly spokelathes, in which a spoke or the like is turned toconform to a suitable pattern, and has for 1ts objects the production ofa more simple, eflicient, durable and satisfactory "device of the kinddescribed. to obtain satisfactory results, it is necessary to keep thecarriage or frame which carries the cutter head, in proper adjustmentwith the means for operating the carriage, the frame which supports thespoke and pattern and the shafting or other means for operating thecutter head. To accomplish this end, in my preferred form of device, Iprovide rolls or their equivalent which support the carriage upon thebed of the lathe and which are so arranged that the position of thecarriage may be adjusted by adjusting the position of the rollsrelatively to the carriage.

To this end my invention consists in the novel arrangement, constructionand combination of parts herein shown and described and moreparticularly pointed out in the claim.

In the drawings wherein like reference characters indicate like orcorresponding parts, Figure l is a front elevation of a completespoke-lathe provided with my improved form of adjustable cutter headcarriage. Fig. 2 is a top elevation of the cutter head carriage, withthe cutter head removed. Fig. 3 is a transverse vertical section of thesame taken on line 33 of Fig. 2. Fig. 4 is a sectional view of the rolland bearings taken on line 44 of Fig. 2. Fig. 5 is a sectional Viewtaken on line 5- 5 of Fig. 4. Fig. 6 is a perspective View of thepreferred form of bearing boxes or saddle blocks. Fig. 7 is aperspective view of the preferred form of back rail or track, and Fig. 8is a perspective view of the preferred form of front rail or track.

Referring to the drawings in which my preferred form of carriage isshown on a spoke-lathe, 1 is a supporting frame and 2 the bed therefor,on which travels the carriage 3 which carries the cutter head 4. Theframe 5 which is called a vibrating In lathes of this kind,

frame and is pivoted to the frame 1 as shown at 5 carries the spindleswhich support the pattern 6 and the work to be turned 7. The cutter head4 is driven through the shaft 23 through the belt 22 or its equivalent,the carriage 3 carrying the cutter head and the downwardly extendingframe 24 along the shaft 23. Any suitable or preferred arrangement fordriving the cutter head and operating the vibrating frame 5 with thework 7 and pattern 6, may be employed.

As is shown, the carriage preferably travels upon tracks or ways 8 and 9provided upon the bed 2 of the frame 1. These tracks may be madeintegralwith the bed if desired but it is found more satisfactory to make one orboth of them separate therefrom and secure them to the bed 2, preferablyin a groove therein, by means of cap screws 10 or their equivalents.When made separate they are preferably made of harder material than thebed so that the wear may be less. Should they wear unevenly, they may,when made removable as shown be taken from the bed in a thin out takenfrom the top of the rail which is worn.

The carriage 4 may be adjustably supported on the tracks or ways anypreferred way or manner as on hearing or sl1ding plates, rolls or theirequivalents. As shown the carriage is provided wlth supporting rolls 11,11 and 12, 12 arranged to travel upon the tracks 8 and 9 on the bed 2. Aflat rail 8 and a flat roll 11 are preferably used on the front of thelathe bed and a V- shaped rail 9 and grooved roll 12 on the rear of thesame. The rolls 11, 12, etc., are provided with a pin or extendedportion 13 which works in the bearings 14, the preferred way being tomake the bearing boxes 14 or saddle blocks as they are called in twopieces one on each side of the roll. The bearing boxes 14 are made ofbrass or other suitable material. The set screws 16 or their equivalentsfor the purpose are used to adjust the position of the bearing boxes 14relatively to the carriage. Lock nuts 17 or their equivalent may beemployed to lock the screw 16. As the rails or tracks 8 and 9 or therolls or their equivalents which travel thereon wear, the position ofthe rolls may be changed so that the carriage is kept in properalinement with its driving means or screw shaft 19, and also inadjustment with the vibrating frame 5 and the driving shaft 23 whichdrives the knives of the cutter head 24;.

As is shown, the boxes or saddle blocks 1 L are flanged as at 15 andpins 13 also capped or flanged as at 13 so that the boxes or saddleblocks are substantially vertically adjustable when retained in theirproper places when inserted in their seats in the carriage. In thepreferred form of carriage shown, the same is extended to form brackets3 in which the bearing boxes or saddle blocks and rolls are placed.

The number of rolls supporting the carriage may be as many as preferredor required, or a part may be adjustable and a part not. By supportingthe carriage in this way it is obvious that the carriage supportingmeans may be adjusted where required, that is, for instance, in thepreferred form of carriage, it is supported by four rolls any one ofwhich may be adjusted as required independently of any of the others.This independent adjustment is an important feature since by a slightadjustment the carriage will always rest on its four supports. I

Having thus described my invention, it is obvious that Variousimmaterial modifications may be made in the form, design or thearrangement shown Within the scope of the appended claim, withoutdeparting from the spirit of my invention, or that the same may be usedon any machine or device to which it is applicable, hence I do not wishto be understood as limiting myself to the exact construction andcombination shown.

What I claim as new and desire to secure by Letters Patent is,

In a. lathe, the combination with a pair of track ways, of a carriage, atrack wheel located at each corner of said carriage, each of said trackwheels comprising a central body portion and a journal portionprojecting from each side thereof, independent bearing blocks, onebearing upon each of said journal portions, said bearing blocks beingvertically movable in the carriage and vertical adjusting screwsthreaded into the carriage and bearing upon said blocks, there being oneof said screws for each of said blocks, said screws serving either tomove the frame vertically with relation to the bearing blocks, or toadjust the track wheels angularly with relation to the carriage.

In testimony whereof, I have hereunto signed my name in the presence oftwo sub scribing witnesses.

CARL D. FISCHER, JR.

VVi tnesses Roy E. LAYTON, ETHEL SHAW.

